Battery power target flowmeter

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ZW - BSL seriesBattery power target flowmeterIs application of A single shear cantilever beam load p…

Products overview:
ZW - BSL seriesBattery power target flowmeterIs application of A single shear cantilever beam load principle, through the force sensor to measure the elastic stress variables, combined with the mechanical and electrical integration of measurement and control technology, the high precision of the sensors in accordance with traffic signals, the signal by the high precision A/D converter, microprocessor CPU, processing operations, such as D/A converter output field liquid crystal display, 4 ~ 20 ma, pulse, working condition of RS232/485, implementation process flow metering measurement and control.
Measuring contact fluid tube have no moving parts, measurement accuracy can be comparable to those, volume, mass flowmeter is also has the characteristics of the seismic, impurities, especially the application and high viscosity, high temperature resistance, low Reynolds number flow measurement, excellent results.

Second,Structure and working principle:

1, structure,

ZW - BSL series battery target flowmeter is mainly composed of measuring tube (shell), new sensors (including choke element), integrating display and output parts.According to the different medium and condition, must choose appropriate sensors, therefore, provide accurate object and parameter measurement, and manufacturers to choose appropriate sensor is the key of the products can be accurate measurement.

2, working principle

When medium in the measurement of pipe flow, because of its kinetic energy and target plate pressure difference, and produce on the target plate force, make the target board of trace amounts of displacement, the force is proportional to the square of the velocity with the media, the size of the target plate force of the target bar transfer, make the sensor elastomer produces trace changes, thereby breaking patches of capacitance bridge balance.Generation and corresponding voltage signal flow force on the target board: by the fluid flow characteristics, the influence of flow rate and is proportional to the square of the voltage produced by the bridge.Its mathematical expression is as follows:

CdA rho/V2 / F = 2

Type: F choke a force (kg) of

Drag coefficient Cd object

A choke pieces on the measuring tube axial projection area (was)

Rho conditions of medium density (kg/m3)

V medium in the measuring tube average flow velocity (m/s)

Choke (target) accept force F, the rigid connection of transfer (rod) to the sensor, the sensor produces voltage signal output: V = KF

Type: V - sensor output voltage (mV), K - proportionality constant, F - choke piece (target) by force (kg),

The voltage signal after preamplifier, AD conversion and computer treatment, obtains the corresponding instantaneous flow and cumulative total.

Applications:
ZW - BSL seriesBattery power target flowmeterIn addition to substitute for the conventional flow measurement can measure flow problems, especially in high viscosity, smudgy medium, easy setting wall, such as high temperature, low temperature, strong corrosion flow metering in difficult condition has the very good adaptability.Widely used in petroleum, chemical, energy, food, environmental protection, water conservancy and other fields.Look from the effect after its use, has very broad applicability, namely: 
1, suitable for all kinds of pipe diameter: from 15-2000 mm Φ Φ to bigger. 
2, suitable for high and low temperature medium: from - 196 ℃ ~ + 450 ℃. 
3, suitable for high pressure conditions: from 0 ~ 42 mpa pressure (table). 

Four, the main features:
1, suitable for all kinds of pipe diameter: 15-2000 - mm to bigger.

2, suitable for high and low temperature medium: - 196 ℃ to + 450 ℃.Can accurately measure all kinds of room temperature, high temperature, low temperature condition of the liquid, gas, steam, viscous medium and all kinds of fluid flow.
3, high sensitivity, can measure small flow rate, it can measure the low velocity of 0.08 m/s.
4, suitable for high pressure conditions: 0-42 mpa.
5, have no moving parts, high accuracy.
6, good repeatability, is 0.1 0.08% commonly, fast measurement.
Total 7, accurate measurement, high accuracy, measurement can reach 0.2%.
8, good vibration resistance to electromagnetic interference, can dry calibration, and farmar hanging weight method.
9, body material: carbon steel, 304316316 L.
10, mode of power supply: 3.6 V lithium batteries;24 VDC power supply;Double power supply: 3.6 V lithium battery + 24 VDC power supply.
Five, the technical parameters:
1, the measurement range of 0-400 t/h;
2, precision grade: 0.5% FS 1.0% FS 2.0% FS.
3, the output signal: 4 ~ 20 ma two wire output and flow into a linear relationship;
4, power supply voltage: 12 ~ 36 VDC;
5, nominal pressure: 1.6 2.5 4.0 6.4 MPa;
6, environment temperature: - 30 ℃ ~ 60 ℃ (special: - 40 ℃ ~ 80 ℃).
7, medium temperature: regular 100 ℃ or less (no heat sink);
Type of high temperature of 400 ℃ or less (with heat sink);
8, liquid material: room for carbon steel or 1 cr18i9ti;The rest are 1 cr18ni9ti;
9, shell material: aluminum;
10, flange standard: DIN2501 special type chosen by the user;
11, cable interface: M20 * 1.5 (internal thread);
12, protection grade: IP65;
13, load characteristic: zui big load resistance (supply voltage - 12) = = 50 * 600 Ω @ 24 v;
14, alarm output, the form of open collector, zui big input current 100 ma, zui big switch voltage 30 VDC, with belt deviation control;
Pulse output: 15, zui small pulse width 50 ms, dual output;
16, zui large cumulative flow display value of 50000 units, automatic reset;
17, damping time: 1 ~ 100 seconds arbitrary adjustable.
18, explosion-proof, explosion-proof, explosion-proof certificate number.
Six, installation instructions:
1, normal temperature, low temperature, high temperature type flowmeter depending on the different working conditions using horizontal, vertical or inverted type installation (the factory check list shall prevail);
2, medium temperature when + 300 degrees above, the user response to flowmeter shell heat insulation measures are taken to prevent thermal radiation damage to the header (header working temperature for 30 to + 70 degrees c), the same work under medium temperature - 100 degrees, also should adopt anti-freezing measures;
3, to guarantee the accuracy of the flowmeter measurement, requirement set straight pipe before and after;
4, in order to ensure the flowmeter in inspection and replacement does not affect the system work, should try to set the by-pass valve (3) and the cut-off valve (1, 2);
5, due to the need of technology can be used vertical installation, the flow direction of medium under test can be bottom-up, also can from top to bottom, but when ordering should explain to the supplier;
6, flow meter diameter and connected to the pipe diameter size is the same as far as possible, to reduce the flow disturbance, caused by measurement error;
7, flowmeter shell must be reliable grounding, without ground conditions should explain to the manufacturer.
Seven, the normal work of environmental conditions:
1, the atmospheric pressure: 86 ~ l06kPa;
2, the ambient temperature: - 20 ℃ ~ + 60 ℃ (8 ℉ ~ l40 ℉);
3, ambient relative humidity: 95% RH or less (+ 25 ℃);
4, flameproof flowmeter can be applied to contain A and B Ⅱ Ⅱ, Ⅱ c-class T1 ~ T4 group of explosive gas mixture of 1 zone and 2 zone for the dangerous sites;
5, the Ann type flowmeter can be applicable to contain A and B Ⅱ Ⅱ, Ⅱ c-class T1 ~ T4 group of explosive gas mixture of 0, 1, 2, the dangerous places.
Eight, note:
1, commonly used to determine the required flow rate, as defined by the common flow of 1.5 ~ 2.5 times and zui heavy traffic.
2, indicate the installation standard flange, seal form, especially for special installation requirements, should be clear let us know.
3, the user shall specify when ordering by flow medium, and the medium density is given.
4, if you need special medium measurement, in addition to select the sounding pipe materials provided by company, can be directly recommend measuring pipe material as needed.

Ten, parameter table: